Xenon FLUORINE

Xenon tetrafluoride also can be prepared by oxidizing xenon with dioxygen difluoride, O2F2, or by photolysis of xenon-fluorine mixture. 

An interesting approach is laser photolysis (A = 488 nm) of xenon-fluorine mixtures at —196°C in reactors made from 6 mm Teflon-FEP tubes with 0.5 mm wall thickness [248]. Only small amounts of XeF2 but in 100% yield and free from XeF4 are obtained. The virtue of this approach lies in its rather broad usability in the fluorination of various reagents dissolved in liquid fluorine (e.g. Kr, Xe, CF, UFj). 

The first synthesis of XeFe was also reported in 1962. All syntheses are best carried out in nickel or monel reaction vessels. From the equilibrium constants for the formation of xenon fluorides, " it is evident that an excess of fluorine is necessary to minimize the formation of Xep4. In addition, the reaction temperature should be as low as possible, yet consistent with a reasonable reaction rate. In the presence of Nip2 as catalyst the activation energy for the xenon-fluorine reaction is lowered and the reaction proceeds rapidly at 393 K, in contrast to 523 K without catalyst. 

The reaction of xenon with platinum hexafluoride yields at least two distinct quinquevalent platinum products, XePtF, and Xe(PtFj)j. A third compound XePtjFij which is diamagnetic, is produced by heating the former. During continuing investigations of the reaction between xenon, fluorine, and platinum pentafluoride, at least two different compounds have been detected. The better characterized compound is produced when 1 1 molar ratios of xenon and platinum pentafluoride are employed in admixture with 80 p.s.i. 

Electron Distribution in the Xenon Fluorides and Xenon Oxide Tetrafluoride by ESCA and Evidence for Orbital Independence in the Xenon-Fluorine Bonding... 

T. X. Carroll, R. W. Shaw, T. D. Thomas, C. Kindle and N. Bartlett, Electron Distribution in the Xenon Fluorides and Xenon Oxide Tetrafluoride by ESCA and Evidence for Orbital Independence in the Xenon-Fluorine Bonding, J. Am. Chem. Soc. 96 (1974) 1989-1996. 

Perhaps the only known example of pentagonal planar symmetry is the ion XePs. On the basis of the symmetry of this ion, predict the number of infrared-active xenon-fluorine stretching vibrations. 

Hamilton, W. C. ibers. J. A. In Noble Gas Compounds, Hyman, H. H., Ed. University of Chicago Chicago. 1963 pp 195-202. Templeton. D. H. Zalkin, A. Forrester J. D. Williamson. S. M. Ibid. pp 203-210. Bums, J. H. Agron. P. A. Levy, H. Ibid. pp2l 1-220. In XcFj the xenon atoms do not touch each other. The estimate of the van der Waals radius must be made by subtracting the van der Waals radius of fluorine from the shortest nonbonded (i.e., between molecules) xenon-fluorine distance (320-330 pm). 

The 1 1 adduct (XVIII), a bright yellow solid, is unstable at room temperature while the pale yellow solid 2 1 adduct appears to be stable. Raman spectra show complete absence of v(Xe—F) at 504 cm-1 indicating the absence of terminal xenon-fluorine bonds. The vsym(SO) and vasym(SO) bands are shifted to 1236 and 1494 cm"1, which are higher than those in the neutral molecule, suggesting cation formation. 

Argon, fluorine Krypton, fluorine Xenon, fluorine Krypton, chlorine... 

A brief VSEPR explanation of structures of xenon fluorine compounds ... 

Claims by Russian workers that a higher fluoride of radon, RnF4 or RnFe, can be prepared in tracer experiments by heating radon, xenon, fluorine, bromine pentafluoride, and either sodium fluoride or nickel fluoride, and converted to RnOa by hydrolysis 240) appeared to others (235) to be due to the precipitation of radon as a solid complex, which is probably [RnFJJlNiFe]. However, the precipitation of CsXeOsF from aqueous solutions results in the coprecipitation of radon, and this has been taken by the Russian group as confirmation that RnOs is the product of hydrolysis of the fluoride formed 241). Furthermore,... 

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